Combined casing and tool spear



l M. w. JONES ET AL. COMBINED CASING AND TOOL SPEAR- Jan. 16, 1923.

FILED DEC. 20.1920.

INVENTOHS `Patented Jan. 16, 1923.

"UNITED STATES,

MONROWE WALTER'JONES AND BERT HUDSON BRUSH. OFARDMORE, OKLAiOMA; u

SAID JONES nssieNoR or His RIGHT To JoNns-nvnniicm:l MACHINEy OOMPANY,

A CORPORATION.

COMBINED CASING-AND TOOL SPEAR.

Application filed December 20, 1920. Serial No.. 431,954.

To wZZwwmz't may concern:

Be it known that we, MONROWE l. JoNns, and BERT H. BRUSH, citizens of the United States, and residents of Ardmore, in the county kof Carter and Stateof Oklahoma,

have invented certain new and useful Improvements in Combined Casings and Tool Spears, of which the following Ais a speciication. Y Our. invention relates to spears used in thedrilling of Wells, and the purposeof our invention is the provision of a spearwhich is operable to simultaneously effect the withdrawal of both the well casing and drilling tool or'underreamer from the well, and to thereby eliminate the necessity 4of withdrawing the'drill line through each and every `joint of the casing asis necessary with spears as heretofore constructed. f l -lev will describe oneform of spearembodyingiour invention and will then point out vthe novelfeatures thereof in claims.

In the accompanying drawings: Figurel is a View showing in front elevation one vform of spear embodying our invention. f

vFigure 2 is a view showingin side elevation the tool shown in Figure 1 with portions thereof broken away.

gure 3 is a'view similar to Figure 2 with the casing gripping members in active position andgthe tripping rod withdrawn from ythe spear. l

Figure 4 is a top plan view ofk Figure 3.

tional view of Figure 2.

vFigure 6 is a .transverse sectional viewtaken on the line 6 6 of F iguref2. ,l l

' Similar reference characters refer to similar parts in each ofthe several views.

Referringv specifically to the drawings, our invention in lits present embodiment comprises a body designated generally at B,'and including a wedgevportion 15 and a circular head portion 16 formed yintegral with the lower endV of the wedge portion. vThe upper end of thewedge portionl is formed with athreaded stem 17, .and the lower end of the head portion 16 is formed to slidably receive therein correspondingly" F igure 5 is a vertical longitudinal secwith a threaded-conical stemj18., The wedge shaped tongues 21formed on ping members 22. f

By this arrangement it will'be'seenthat the gripping members are yslidable longitudinally on the faces 19, and that when at the upper edge of the wedge portionthey occupy expanded positions, while `when at the lower end thereofv they occupy .contracted positions.` The gripping members are normally biased to the active or eX- pandedposition by meansof coiled eXpansible ,springs 23 which are seated within pockets 24'formed in the head portions 16.'

The lower-ends of the -gripping members 22 are formed with studs 25 that it Within the upper ends of the springs 23`sof asfto properly center the `same with respect ,to the grippingmembers and formaintaining the.two properly connected. at all times.,l

The upward.v movement of `thev gripping members underfthe action of the springs is y l limited or defined by Vabutment pinsj26. ari ranged in spanning relation with respect to the upper ends ofthe-grooves 20. As shown in Figures 3 and 5, the pins`26y are offdovetailed formation in cross lsection and are adapted to vfit'incorrespondingly shaped grooves formed in the wedge portion 15.

The pins 26 are adapted t0 be engaged the tongues .'21 of the Vgripping members and to 4thereby limit the upward-movement of the members and at the same time prevent displacement ofthe members from the slots.` .i ,i

The grippingmembers 22 are adaptedto casing gripi I be locked infinactivev orcontracted position by Vmeans of dogs 27 pivotally supported on pins28. As shown Figure 2, the dogs are .arranged within `a' Suitable recess formedin the `wedge portlon 15 and have accommodate a tripping rod 29. As shown in lFigure 6, the pins 28 are partly screwl threaded and formed with grooved heads ,so that they-may Vbefapplied and ,removedy in the mannerof screws. The tripping rod rod is slidably fitted within an'opening 30, (Figure 4) so that such rod is capable of being removed from the wedge portion of the body. v,For the purpose of locking the Ytripping rod in position between.. the k,iconfronting vends of the dogs 27, a loclring pin their-inner endsA normally spaced apart to 31 is provided which is insertible within a suitable opening formed in the body, such opening` intersecting the opening 30. This pin 31 is of extremely small diameter so that it can beg-readily sheared, and in its applied position it extends through a suitable opening formed in the tripping rod Q9 thus locking the rod in position between the dogs 2.7. The pin 31 is of sutlicient strength to normally maintain the rod in locking position but when sutiicient upward pull is exerted upon the rod, the pin is shear-ed thus permitting the rod to be removed from between thel dogs. `With the. dogs disengaged by the rod, it will be clear that under the expansible action of these springs 23, the gripping members 2 2 are free to move upwardly to expanded position, the dogs swinging upon the pin 28 and thus moving free of the members.

In the present instance, the gripping members have their curved surfaces formed with downwardly extending teeth 32 for the purpose Vof gripping the inner surface of the well casing in effecting a removal of the latter, as will be hereinafter described. Theupper end of the tripping rod 29 is provided with a threaded stem Q9 to which a rope socket, jars and sinker bar, such as are used on a wire line cutter, may be connected to the tripping rod sothat the latter can be actuated from the body 15 after the pin 31 has been sheared As clearly shown in Figure v5, the body of the spear as well as the stems 17 and 18 are bored longitudinally to provide a duct through which the drill line is adapted to be extended. The lower end of the duct 33 communicates with the interior of a socket 34 threadedly Aconnected to the stem 18. The lower end of the socket 34 is interiorly formed with a frusto-conical seat 35 in 'which are slidably tted a plurality of gripping jaws 3G. The gripping jaws 36 are tapered in thickness, and are inte riorly formed with upwardly extending teeth, as clearly shown in Figure 5,` the arrangement of the jaws being such that the conical seat co-acts with the same to effect a constriction thereof to effect a gripping of a tool shank. The several jaws 3,6 are biased downwardly within the seat 35 andl consequently into constricti'ng position by means of a coiled expansible spring 37 litted vwithin the socket 34 and` interposedv between the jaws and a spacing sleeve 33. This arrangement permits an upward movement and consequently a spreading of the jaws when an upward force sufficient to l overcome the tension of the spring 37 is exerted.l

ln the operation of the spear, let it be assumed that av drilling tool orunderr'eamer is lodged in the wellat the lower end of the well casing and that it is desired to remove the tool as well as-,the well`r casing. To effect lthis removal, the drill line un* wound from the drum of the bull wheel to permitof thev insertionof` they free end. of the drill lineupwardly through the socket 34 and the duct 33 of the spearbody. The spear now havin-g been applied to the drill linethe lineL is again wound upon the drum of the bull wheel and by rotating the wheel at the same time holding the spear against downward movement upon the drillf line, the drill tool is moved as far up into the well casing as possible. lith the drill' tool held inthis. positiom the'spear is lowered into the well' casingwith `the usuali sand linesliding down'the drill-line andinto en-I gagement with they drill. tool. Asl the* spear engages the drilltool, the shank of the tool passes into the socket 34, the force ofthe impact being sufficient to move the gripping jaws 36V upwardly and into expanding posi tion. As soon as the forceof` this impact is spent, the spring 37 re-acts lto move the jaws 36 downwardly and into gripping position with respect to the tool sha-nk so t-hat'wl'ieny ried upwardly with the same. This -operation having been completed, the gripping members are moved into biting engagement with the well casing by an actuationkof the tripping rod` 29 ini the manner rpreviously described. Thus, the spear is *inv gripping relation with respect toA the vdrilling Itfoolk and 'the well'casi'ng` sol that by lifting the spear and the well casing either through the medium of the drill line or the well'casing, la removal ofthe well casing andthe drilling tool is simultaneously effected. In practice, it is desirable that a suitable rope knife be lowered into they wellcasing and the drill cable cut at a pointl'adjacent the top of' the spear, and the removal ofthe tool;,' f"spear and well. casing effected by an elevation, of the well casing.

From the foregoing operation, `it will be manifest that the withdrawal `of the drilling tool and well casing may be expeditiously effected without thel necessity of withdrawing the drill line through eachy andv every joint of the well casing, as is' the present practice. Y Although we have herein shown and described only one form casing and tool spear empodying 'our invention, it is to be understood that various changes and" modifications may be made herein withoutdeparting from the spiritof the invention andthe spirit and scope of the appended claims; What we claim is: ,LA combined casing and tool spear comprising, a body having an open bore'the'rethrough: adapted'to receive a drill line, casing locking members movable to active'and inactive positions, means `for biasing;y the members to active positiommeans for latch'- 90 the spear is lifted, the drill tool will be can s y ing the members in inactive position against the action of said biasing means, said latching means being movable to a releasing po-`Y sition to release the locking members, a socket detachably secured to the body, and means within the socket for permitting the insertion of the stemof a drilling tool therein and for locking the stem against withdrawal. v

2. A combined casing and tool spear comprising a body having an open bore therethrough adaptedto receive a drill line,`

casing locking members lmovable to active and inactive positions, means for lbiasing the members to active positions, means for4 latching the members in the inactive position against the action of said biasing means, said latching means being movable to release said locking members, a socket detachably secured to the body and having a. conical inner wall at one end thereof,

gripping jaws seated within said frusto- -conical portion, a spacing sleeve within the socket, and an expansible springv interposed between the sleeve andjaws for biasing the latter in the direction of the conical wall for the. ypurpose described.

3. A combined casing and tool spear comprising, a body bored to receive a drill line, divergent surfacesformed onk the o posite sides of the body and having grooves formed therein, casing locking members movable over Said surfaces and having tongues engageable within said grooves, abutment keys spanning said grooves forflimitin'g the movement of the locking members in, one direction over said surfaces, springs tted within the body for biasing the members in the direction of the keys to effect an expansion of the members, a pair of locking ldogs pivotally supported within the body and normally engaging theends of the mem-f bers for locking the same against movement, a tripping rod normally interposed between the dogs for maintaining the same in locking position, and a locking pin for maintaining said tripping rod in locking posiin and for locking the stem against with-` drawal. Y

5. A combined casing'and tool spear comnrisin a bod havin an Io en bore therei :sa p

through adapted to'receive a drill line and including a wedge andahead', casing,y gripping members slidable on the wedge, springs fitted withiny said head and engageable with the gripping members for moving the -latter into expanded position under the action. of said wedge, means forlatching the members of said springs, removable and releasable means for maintaining the latching Ameans in latching position.y

6. A combined rcasing and .tool spear.` comprising, abody having 'an open bore therethrough'adapted to receive a drill line and fitted within said head andengageable with the gripping members for moving the 4lat-` ter into expanded position under theaction of said wedge, means for latchingthe members in a contracted 'position/against the` action of said springs, removable and releasable means for maintaining the latching means in latching4 position, and' means carried by said head for receiving and grippinb including a wedge and a head, casing gripping members slidable on the wedge, springs the stem of a'drilling tool whereby when theA spear is elevated within 'awellcasing, the

7'. Afcombined casing andtool `spear comprising, a body having an open bore therethrough adapted to-receive a drill line andV` including'a wedge and ahead, casing gripping in cnibers slidable on the wedge,-springs.v

Vdrill tool is carried upwardly With the spear;

fitted within said'head and engageable with the gripping members for moving the latter into expanded position under the action of said wedge, means for latching the members in a contracted position against lthe* action of said springs, removable and releasable 4means for maintaining the latching means in latching position, a socket detachably secured to the head, gripping jaws withinthebody, and yieldable means nor-l mally acting to contract the jaws.

8. In a device of the character described,

abody having an open bore extending axially thereof, locking meanssupported on viio thel body for movement from an inactive position toan active position, said means 1 being adaptedl to' engage the inner wall of a casing in which the body is disposed inl .I such manner as to lock the body. to the casing when the locking means is in activeposition and to permit of the body slidingv in c,

the casing'when thelocking means is in an inactive position, andfrangible'v means for f 120 y inactive position, said frangible means being normally retaining the locking means in an of a nature to be rendered ineffective when a'fstrongpull is exerted on `the body.

MoNRowE w; Jonssv V.BERT HUDSON 7o i in a contracted position againstthe action l i 

